Improvement in grist-mills



' B. WHITNEY.

Grist Mill,

Patented Oct. 27, 1868.

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BENNET WHITNEY, OF NEW BRUNSWICK, JERSEY. Letters Patent No, 83,574,dated October 27, 1868.

IMPROVEMENT IN GRIST-MILLS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, BENNET WHITNEY, of NewBrunswick, in the county of--Middlesex, and State of New Jersey, haveinvented a new and useful Improvement in Grist-Mills; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof,

which will enable others skilled in the art to make and use the same,reference being had to the accompanying taken on the plane of thesection y y, fig. 1.

Figure 3 is a detail front view of the upper part of the same.

Figure 4 is an inverted plan view of the lower revolving stone.

Figure 5 is an inverted sectional horizontal view of the same, taken onthcplane of the line z z, fig. 2.

Similar letters of reference indicate like parts.

The object of this invention is to so construct a gristm'ill that theupper stone will be allowed to swing in either direction, and can at thesame time be adjusted up and down; that no meal can escape through anupper opening in the curb; that the whole mechanism can be easily takenapart, without disturbing the bottom of the curb; and that the hopperand its shoe can be arranged on either side of the mill, as may bedesired.

The invention consists, first, in hanging the upper stone, by means oftwo trunnions, in two bars, which are up-and-down adjustable, on aplate, which is also up-and-down adjustable, by a nut, working on afixed vertical screw, and which plate can swing somewhat on that screw.The upper stone is thereby made upand-down adjustable, as well asswinging.

The invention consists, second, in suspending the shoe, by means ofstraps, from bars, which are reversible on the frame of the mill, and insupporting the hopper on the same bars, so that the shoe and hoppermaybe arranged on either side of the machine.

The invention, finally, consists in the use of an elastic band or hose,interposed between the upper stone and the curb, to prevent meal fromflying out at the top.

A, in the drawing, represents the frame of my improved mill, made ofwood, cast-iron, or. other suitable material, of suitable form anddimensions,

The frame has a step, a, formed on it, for; the sup: port of the'spindleB. j

G is the curb, i. 0., a cylindrical shell, supported on the frame A, andsurrounding the lower stone D, and the lower part, at least,.of, theupper stone E.

F is an annular plate, fitted into or, to the lower part of the curb,below the lower stone D, as shown in figs. l and 2. v

It has an upward-projecting flange, b, at its inner edge, so as to forman annular trough, for the reception of the meal.

This trough has an aperture, 0, through which the meal can bedischarged.

The lower stone has a polygonal central apertiu'e, whichis filled by ametallic box, (I, through the conical aperture of which the conical partof the spindle fits loose, sop-s to support the stone.

Fromthe spindle project two lugs or pins, 0 c, which fit into notchesprovided in the box al.

The stone, D, is, by means of the pins 0, carried round with thespindle.

On the under side of the stone, D, are fitted projecting arms f f, whichare either parts of a plate, G, or

are otherwise attached to the stone, so as to project into the trough.These arms, as they revolve with the stone, 1), clear the trough, andsweep the meal into the aperture 0, to thereby convey it to a suitablereceptacle.

Between the upper stone, E, and the curb 0 there is interposed anelastic hose, or an elastic band or wall, H, which prevents the mealfrom flying out on top,

and which still permits the saidupper stone to swing.

I is. a vertical pin, fitted, stationary, through a horizontal plate, g,of the frame, above the upper end of the spindle. That'part of the pin Iwhich projects above the plate g is provided with a screw-thread, butits loose end is not.

On the upper end of the spindle B is secured a metal box, J, with asocket in its upper part, for the reception of the lower end of thepin 1. As the spindle is revolved, its upper end is thus guided on thefixed pin I.

The plate 9 is, at its ends, bolted to the uprights of the frame A, asin fig. 1, so that it can be readily re moved, to allow the removal ofthe spindle and stones.

The box J is of irregular, polygonal, or other camshape, for the purposeof shaking the shoe K.

The upper stone, E, is provided with two projecting pins h, which are inline with each other, and which are fitted into the lower ends of twovertical bars, '1. i, which,-passing through openings in plate g, aresuspended from a horizontal bar or plate, L, as in fig. 1.

The bars i are slotted, and bolted to the ends of L, so as to beup-and-down adjustable thereon.

The bar L has a horizontal slot, into which a nut, j, is put, that workson the screw I, the body of the bar L being also fitted around the screwI, but so that it can swing thereon, the apertures through which thescrew fits being large enough to allow such swinging motion. v

By turning the nut j, the-bar L, and its appendages, ih E, will beupd-down adjusted.

The stone, E, ca also be raised and lowered by adjusting the bars i onL.

The stone, E, can swingon the axis of the pins h, and also, with itsframe 3 L, on the pin 1.

M M are two Z-shaped bars, each provided with a hook, I, at the junctionof the upper horizontal with the vertical arm, as in fig. 2.

Each of these bars is hung upon the plate 9, on the edge of which areuprightribs m m, to receive the hooks.

The lower horizontal arm of each bar M rests under the plate g, betweentwo ribs, u n, or in a groove formed on the under side of the same.

One end of the shoe K is, by means of straps o o, suspended from theupper arms of the bars M, as in figs. l and 5, while the other end is,by means of a forked strap 1), (fig. 3,) suspended from a pin. r, thatprojects from one of the bars M. The pin r is removable.

The strap 1) is drawn through an eye, formed on the pin 0', and is thenwound around the said pin,.and, finally, clamped between the bar M and arib, n, as in figstii and 5.

By loosening the strap 1), the height of the shoe, or rather its degreeof inclination, can be regulated.

The shoe is slotted, or grooved, or forked, as in fig. 5, and fitsaround both sides of the cam J, so as to be oscillated by the same, whenthe spindle B is rotated.

The hopper N is also supported on the bars M, on the upper horizontalarms of the same.

As the bars can be reversed on the plate y, the shoe and hopper, whichare or may be solely suspended from them, are also reversible, so thatthey can be arranged on either side of the machine, as may be mostconvenient.

Having thus desclibed my invention,

I claim as new, and desire to secure Patent- 7 1. The arrangement of theelastic packing H, interposed between the upper stone E and the curb 0,substantially as and for the purpose set forth.

2. In combination with the stone, E, the .pins h, slotted sliding bars1', slotted plate 5 adjustable plate I stationary screw I, and nut j,all operating as described, for the purpose of adjustably suspending thestone, E, in the framing, asherein shown and described.

3. The reversible z-shaped bars M, when provided with hooks 1, arrangedto support the hopper and shoe ofthe grist-mill, as herein describedBENNET WHITNEY.

by Letters Witnesses:

HENRY \VBITNEY, A. M. WAY

